F5 Investors Face Feb. 17 Deadline in Securities Suit Over Alleged Long-Term Breach
The complaint centers on claims that F5 overstated its security posture during a persistent breach affecting BIG-IP.
Overview
- A federal class action is pending in the Western District of Washington covering investors who bought F5 securities from October 28, 2024 through October 27, 2025.
- Notices state the lead-plaintiff motion deadline is February 17, 2026, with no class yet certified.
- Filings allege F5 promoted strong security as a long-term intrusion compromised systems tied to BIG-IP, the company’s highest-revenue product.
- F5’s October 15, 2025 breach disclosure and its October 27, 2025 guidance update preceded stock drops of about 13.9% and 10.9% over the surrounding days.
- Plaintiff firms including Rosen, Schall, DJS, Faruqi, Robbins, and Bragar Eagel & Squire are soliciting investors to participate or seek lead-plaintiff status.